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Aging of low‐density polyethylene in natural weather, underground soil aging and sea water: Effect of a starch‐based prodegradant additive
Author(s) -
Elanmugilan M.,
Sreekumar P.A.,
Singha N.K.,
AlHarthi Mamdouh A.,
De S.K.
Publication year - 2013
Publication title -
polymer engineering and science
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.503
H-Index - 111
eISSN - 1548-2634
pISSN - 0032-3888
DOI - 10.1002/pen.23494
Subject(s) - low density polyethylene , accelerated aging , polyethylene , materials science , weathering , starch , ultimate tensile strength , degradation (telecommunications) , elongation , composite material , environmental science , chemistry , geology , food science , telecommunications , geomorphology , computer science
This article reports the results of studies on the degradation of the blend of low‐density polyethylene (LDPE) with a starch based prodegradant additive, named commercially as Polystarch plus H and abbreviated as PSH, under natural weather, underground soil aging, and sea water aging in Dhahran, Saudi Arabia. The work includes measurements of tensile properties, thermal behavior, and scanning electron microscopic (SEM) studies on the unaged and aged LDPE and the LDPE/PSH blend having 25% (w/w) of PSH. Results of the preliminary experiments showed that changes in properties are not prominent at lower loadings of PSH. In the case of the blend, incorporation of the additive PSH caused a reduction in elongation at break, which is accentuated under aging. The effectiveness of the prodegradant additive in the degradation behavior follows the order, natural aging > underground soil aging > sea water aging. It is believed that the prodegradant additive is effective in chain scission in sunlight under natural weathering conditions, in contrast to underground soil aging and sea water. POLYM. ENG. SCI., 53:2389–2397, 2013. © 2013 Society of Plastics Engineers